Past Projects

  • Air Permitting for Vinyl Adhesive Coating Lines

    Air Permitting for Vinyl Adhesive Coating Lines

    A major manufacturing facility, the largest source of VOC emissions in the state, required a rapid plant expansion to meet increased production demands. Plans included new coaters and drying ovens with emission controls such as carbon absorption (99% efficiency) and catalytic incineration. A phased permitting approach was used to meet immediate and long-term production demands. ERA navigated complex permitting issues Continue Reading

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  • Indoor Air Pollution Study for Hospital

    Indoor Air Pollution Study for Hospital

    A regional hospital experienced staff complaints symptomatic of polluted building air. ERA reviewed the hospital's air handling systems and pollution sources in and outside the hospital, assessing likely causes, and proposing solutions. A detailed study modeling outside air pollution sources including an incinerator, diesel generator fumes, fuel truck fumes and roof hoods, showed that several air intakes drew polluted air Continue Reading

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  • Subsurface Study & Remediation of Gasoline Product in Bedrock

    Subsurface Study & Remediation of Gasoline Product in Bedrock

    During subsurface investigations, ERA discovered floating gasoline product up to 12 feet thick in bedrock within a city block-sized area occupied by service stations since the early 1920's. Following ERA obtaining approval from regulators, the client excavated 5,100 tons of contaminated soil for offsite recycling. ERA designed and provided observation services for a series of pumping wells with interconnecting underground piping Continue Reading

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  • Residual Oil Spill to River

    Residual Oil Spill to River

    Several hundred gallons of residual No. 6 fuel oil contaminated several miles of a river that was previously contaminated by oil from different urban sources. ERA provided investigatory, remedial design, and monitoring services. After notifying the regulatory agency, ERA planned and monitored an Immediate Response Action (IRA) to remediate surface water, tainted vegetation and the river banks. Booms placed at strategic Continue Reading

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  • Monitored Natural Attenuation for Gasoline Station

    Monitored Natural Attenuation for Gasoline Station

    Contamination released at a gasoline station contaminated groundwater within a public wellhead protection zone. ERA conducted subsurface investigations and groundwater modeling to establish the extent of contamination and the future impact on residential and public drinking wells located downgradient of the station. Our risk assessment and evaluation concluded that the plume had stabilized due to natural biodegradation, and that Monitored Continue Reading

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  • Design of a Landfill Leachate Treatment System

    Design of a Landfill Leachate Treatment System

    ERA prepared design plans and bid specifications for a major upgrade to an existing leachate wastewater treatment system for a regional landfill. The 600 gpm system was designed to remove heavy metals prior to sewer discharge. ERA conducted batch and pilot scale testing over a six-month period to supplement existing data and provide a basis for design of the new Continue Reading

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  • Latex Wastewater Treatment for Textile Industry

    Latex Wastewater Treatment for Textile Industry

    A large manufacturer of upholstery fabrics required pretreatment for latex wastewaters containing high concentrations of solids, BOD, and especially difficult-to-treat chelated zinc. ERA characterized the production process and waste streams before conducting bench and pilot scale treatability tests onsite. Design plans, specifications and permits resulted in the construction of the full scale chemical treatment system. In addition, ERA provided construction Continue Reading

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  • Recycle System for Optical Grinding Process

    Recycle System for Optical Grinding Process

    A manufacturer of piezoelectric and frequency control devices discharged grinding fluids and other wastes into an in-ground leaching bed. Since no sewers were available, ERA designed a recycle system to eliminate the discharge without compromising stringent water purity standards for the manufacturing process. ERA studied the manufacturing process to reduce contaminant loadings and the overall volume of wastewater generated. ERA Continue Reading

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